Державний Вищий Навчальний Заклад "Криворізький Національний Університет"
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Drilling And Exploitation, And Mining Machines And Methods
(AREA)
Earth Drilling
(AREA)
Abstract
The method of passing the mining involves drilling holes in a predetermined depth of the contours of excavation and filling the holes with explosive, the collapse of the rock mass in the contours of excavation, cleaning of the littered rock mass with drilling out the holes for the next step for passing of excavation. It is determined the length of the holes and, respectively, the estimated length of the "cup", i.e. a non-collapsed parts of the holes in the rock mass, which are created at the initiation of the explosive in the passing of excavation. After drilling out the holes the cylindrical restraining member of a material having an acoustic stiffness is disposed in a cavity in each end portion. The length of the restraining member is performed with the corresponding gauge length of "cup", which is formed after the collapse of the rock. After placing the restraining elements in the holes of the cavity the latter are filled with an explosive, as well as with initiating elements. After that the holes are filled with toe and the rock mass is collapsed in the contours of the excavation for the step of passing, and then after the collecting the rock mass the locking elements are removed from the "cups" and drilling and explosive works are performed for the further steps for passing the excavation.
UAU201508599U2015-09-042015-09-04Ways of passing the mine workings
UA105515U
(en)
Mining method of underground exploitation by leaching in mansions, includes the construction of mansions in the mineralized body, mineral fragmentation, extraction of a smaller amount of material, drilling of boreholes, injection of acid solution fluid for leaching in situ, leaching in piles surface, leaching solution collection.